Census tract · San Mateo County
Census Tract 6048, San Mateo County, California
Census Tract 6048, GEOID 06081604800, in San Mateo County, California, entirely within Millbrae. 5,464 residents in the ACS 2020-2024 5-year estimates (±659); the 2020 Census counted 5,207.
Residents, 2020-2024
5,464
±659 (90% margin)
2020 Census count: 5,207
Median household income
$158,235
±$28,521 (90% margin)
San Mateo County: $158,855
Median home value
$2,000,000 or more
The survey's top or bottom value; no margin is published
San Mateo County: $1,559,600
Median gross rent
$3,273
±$316 (90% margin)
San Mateo County: $2,922
Where is Census Tract 6048?
Census Tract 6048 is one of 174 census tracts in San Mateo County, California. It covers 0.40 square miles of land, 13,050 residents per square mile in 2020. Its GEOID, 06081604800, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Millbrae | 100% |
4 census tracts border Census Tract 6048: Tract 6044 ($133,654), Tract 6045 ($188,750), Tract 6047 ($226,667) and Tract 6049 ($148,421). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 6048?
The 2020-2024 American Community Survey puts Census Tract 6048's population at 5,464 (±659) in 1,858 households; the 2020 Census counted 5,207 residents and 2,006 housing units.
| Measure | Tract 6048 | Millbrae |
|---|---|---|
| Total population | 5,464 ±659 | 22,689 |
| Households | 1,858 ±235 | 8,121 |
| Average household size | 2.93 ±0.30 | 2.76 |
| Housing units | 2,053 ±230 | 8,705 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 6048?
The median resident of Census Tract 6048 is 43.9 years old; 19.5% are under 18 and 18.6% are 65 or older. The largest group is non-Hispanic Asian residents at 40.7%, then non-Hispanic white residents at 34.8%. 41.9% of residents were born outside the United States.
| Measure | Tract 6048 | Millbrae |
|---|---|---|
| Median age | 43.9 ±5.2 | 43.7 |
| Under 18 years | 19.5% ±4.4 pts | 19.0% |
| 65 years and over | 18.6% ±4.0 pts | 20.3% |
| Hispanic or Latino (any race) | 15.6% ±7.5 pts | 13.9% |
| White alone, not Hispanic | 34.8% ±8.6 pts | 29.4% |
| Black or African American alone, not Hispanic | 2.0% ±2.1 pts | 0.8% |
| Asian alone, not Hispanic | 40.7% ±9.6 pts | 48.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.8 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 2.5% ±3.7 pts | 1.9% |
| Two or more races, not Hispanic | 4.5% ±2.2 pts | 4.6% |
| Some other race alone, not Hispanic | 0.0% ±0.8 pts | 1.1% |
| Born outside the United States | 41.9% ±7.8 pts | 40.8% |
| Speak a language other than English at home (age 5+) | 44.2% ±8.8 pts | 48.7% |
| Civilian veterans (age 18+) | 2.0% ±1.3 pts | 2.6% |
| With a disability | 10.7% ±4.0 pts | 9.3% |
| No health insurance coverage | 4.8% ±2.0 pts | 3.6% |
| High school graduate or higher (age 25+) | 93.6% ±3.4 pts | 93.6% |
| Bachelor's degree or higher (age 25+) | 47.2% ±8.6 pts | 52.7% |
| Graduate or professional degree (age 25+) | 16.3% ±4.5 pts | 21.6% |
| Lived in the same house a year earlier | 83.4% ±6.9 pts | 88.3% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 6048 earn?
Half of the 1,858 households in Census Tract 6048 earn less than $158,235 a year (±$28,521), against $158,855 across San Mateo County: 92nd highest of the county's 172 tracts with a reliable estimate. 11.2% of residents live below the poverty line.
| Measure | Tract 6048 | Millbrae |
|---|---|---|
| Median household income | $158,235 ±$28,521 | $163,476 |
| Mean household income | $205,107 ±$25,045 | $215,347 |
| Per capita income | $71,698 ±$8,476 | $78,551 |
| People below the poverty line | 11.2% ±5.6 pts | 6.0% |
| Children under 18 below the poverty line | 22.7% ±16.8 pts | 7.2% |
| Households receiving SNAP | 5.3% ±3.2 pts | 2.8% |
| Households with a computer | 93.4% ±9.2 pts | 97.0% |
| Households with a broadband subscription | 90.4% ±9.0 pts | 93.6% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 6048?
Owners occupy 31.5% of Census Tract 6048's occupied homes and renters 68.5%. The median owner-occupied home is valued at $2,000,000 or more by its owner (). The median renter pays $3,273 a month including utilities, and 41.2% of renters pay 35% or more of their income on rent.
| Measure | Tract 6048 | Millbrae |
|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $1,934,900 |
| Median gross rent | $3,273 ±$316 | $3,272 |
| Renters paying 35% or more of income on rent | 41.2% ±12.2 pts | 44.0% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 31.5% ±6.6 pts | 60.8% |
| Renter-occupied homes | 68.5% ±6.6 pts | 39.2% |
| Housing units | 2,053 ±230 | 8,705 |
| Single-family detached homes | 43.1% ±7.4 pts | 61.1% |
| Mobile homes | 0.0% ±2.0 pts | 0.0% |
| Built 2020 or later | 0.5% ±0.8 pts | 1.0% |
| Built 2010 to 2019 | 2.3% ±2.8 pts | 4.8% |
| Built 1939 or earlier | 16.5% ±4.7 pts | 6.4% |
| Households with no vehicle | 15.8% ±9.7 pts | 7.8% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 6048 get to work?
64.7% of Census Tract 6048's workers drive alone and 16.7% work from home. The average trip to work takes 30.6 minutes. The unemployment rate in 2020-2024 averaged 2.9%.
| Measure | Tract 6048 | Millbrae |
|---|---|---|
| In the labor force (age 16+) | 66.0% ±5.0 pts | 65.8% |
| Unemployment rate | 2.9% ±1.7 pts | 5.7% |
| Drove alone to work | 64.7% ±8.5 pts | 59.0% |
| Carpooled | 4.9% ±3.5 pts | 8.1% |
| Public transportation | 11.8% ±4.7 pts | 7.5% |
| Walked | 0.9% ±1.2 pts | 1.4% |
| Worked from home | 16.7% ±6.5 pts | 22.2% |
| Mean travel time to work | 30.6 min ±3.4 | 28.6 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 6048 compare with the other tracts in San Mateo County?
Among San Mateo County's tracts with a reliable estimate, Census Tract 6048 ranks as shown below (1 = highest).
| Measure | In San Mateo County | In Millbrae |
|---|---|---|
| Population | 36th of 172 | 1st of 6 |
| Residents per square mile | 41st of 173 | 1st of 6 |
| Median household income | 92nd of 172 | 4th of 6 |
| Per capita income | 102nd of 172 | 5th of 6 |
| Median home value | 1st of 171 | 1st of 6 |
| Median gross rent | 66th of 169 | 4th of 6 |
| Poverty rate | 17th of 94 | 1st of 4 |
| Bachelor's degree or higher | 107th of 172 | 5th of 6 |
| Median age | 57th of 172 | 4th of 6 |
| Owner-occupied share | 149th of 171 | 6th of 6 |
The tracts next to it on San Mateo County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 6003 | 89th | $159,853±$59,164 · within the margin of this tract |
| Tract 6033 | 90th | $158,819±$28,533 · within the margin of this tract |
| Tract 6117 | 91st | $158,333±$47,244 · within the margin of this tract |
| Tract 6048 | 92nd | $158,235±$28,521 |
| Tract 6106.02 | 93rd | $157,250±$42,381 · within the margin of this tract |
| Tract 6004.01 | 94th | $157,083±$31,001 · within the margin of this tract |
| Tract 6063 | 95th | $156,820±$38,260 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 6048?
1 of the 18 figures for Census Tract 6048 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections